England is rife with lawlessness and highway robbers but the Bow Street Runners are on the case using all manner of traps and tricks to round the criminals up. However one robber has evaded captured and succeeded in even giving Sir Roger Daley a bloody nose in front of his own men. Thus Captain Fancey is assigned to go undercover and catch the famous Dick Turpin and bring him to justice. However the cunning Dick is not going to be caught that easily and for years has moved incognito under the alias Rev Flasher.
Although the better entries in the Carry On series tend to be the costume spoofs, this is not one of them. The story is a reasonable stab at having a frame for the jokes to roughly hang within but the problem is that the material just isn't there to deliver the goods. The humour will appeal to some because it is broad and the usual double-entendre stuff but for me it was lacking in any wit or intelligence and just felt like someone had collected up all the rejected gags from other films and put them together in a script of sorts. So, yes, some of it is funny but mostly it is uninspired and far from being the series at its best.
A lot of it seems to rely on the actors being a draw in themselves and it shows because most of them force their personalities forward in place of good material. James is the most obviously guilty of this as he overdoes his trademark laugh and is larger than the character. Windsor likewise just trades on her body and giggle; Williams is so-so but cannot raise the poor material he is handed and he can't rely on Jack Douglas for any help. Bresslaw at least gets a different role from his usual ethnic face-paint stuff but Jacques, Connor and Sims all seem stuck with nothing to do in minor roles. They all appear to be trying but none of them can make the material more than it is lacklustre.
Overall this is a broad and crude affair that might please some Carry On fans but will be far too basic to be of interest to the majority of viewers. The cast are all trying hard but really the material isn't there for them to work with and the whole thing ends up being disappointing even by the standards of Carry On movies.